B.G.
I was in Girls Scouts all through high school, and we focused a great deal of our time on camping, nature, fire safety, etc. If this is what you and your daughter really like, why not start your own troop?
Each Girl Scout Troop has a different focus depending on the interests of the leaders and the girls but mostly depending on the knowledge and skills of the leaders. If the leaders of your daughter's troop have never been camping or don't know much about nature, they will probably focus on something they feel much more comfortable about.
If you don't have time to be the leader you could always talk to your daughter's leaders about her interests and see if there is a way to incorporate more of that. Perhaps they would really appreciate your experience and expertise.
Girls Scouts has many, many summer opportunities that she might be interested in. Our counsel had day camps and resident camps, but it also had "Wider Opportunities." They involved week long or two week long trips with a much more narrow focus. I bet she could find something there that would really appeal to her.
Girl Scouting really does offer the things your daughter is interested in. You just have to find the right people.